论文标题
优化不对称量子奥托发动机周期
Optimization of Asymmetric Quantum Otto Engine Cycles
论文作者
论文摘要
我们考虑了有限的量子奥托热发动机周期的工作输出和波动的优化，该循环包括不等持续时间的压缩和扩展工作中风。周期的不对称为特征是参数$ r_u $，给出了压缩和扩展工作中的时间比例。对于这种不对称的量子奥托发动机周期，将工作物质选择为谐波振荡器或两级系统，我们发现$ r_u $的最佳值最大化了工作输出和可靠性（定义为平均工作输出的比率与平均值偏差的比率）显示出与总计所花费时间的不连续性的功能。此外，我们确定了某些特定持续时间的周期，其中工作输出和可靠性都将其最大值用于相同的不对称参数$ r_u $的值。
We consider the optimization of the work output and fluctuations of a finite-time quantum Otto heat engine cycle consisting of compression and expansion work strokes of unequal duration. The asymmetry of the cycle is characterized by a parameter $r_u$ giving the ratio of the times for the compression and expansion work strokes. For such an asymmetric quantum Otto engine cycle, with working substance chosen as a harmonic oscillator or a two-level system, we find that the optimal values of $r_u$ maximising the work output and the reliability (defined as the ratio of average work output to its standard deviation) shows discontinuities as a function of the total time taken for the cycle. Moreover we identify cycles of some specific duration where both the work output and the reliability take their largest values for the same value of the asymmetry parameter $r_u$.
